20 billion requests a week: Upgrading Twilio's API gateway at scale

Twilio's API Gateway is the front door for over 20 billion requests a week, regularly sustaining peaks of 60,000+ requests per second. Over the past four years, Twilio has migrated from a legacy system built on a decade of rapid growth to a modern, hardened ingress stack. In this session, we'll go under the hood of how we modernized our gateway by unifying behind a common core, requiring explicit, contract-first development, and utilizing cellularized and redundant infrastructure principles. Join us to learn how we successfully untangled ten years of technical debt, crossed the river, and built for the future to simplify Twilio’s enterprise ingress, all with zero major disruptions to customer traffic.